I think it’s fine. A slight age difference is not that big of a problem, though you might have to deal with judgment from your family / peers. I would keep your relationship hidden until you’re both old enough to where it’s not that big of a deal, i.e. she’s 18.
You should definitely prefer older girls so that time period is less. America is a funny country when it comes to sex. If you’re prudent and don’t do anything stupid, like have unprotected penetrative sex, then you shouldn’t be exposed to any of that.